hydration
noun
\
Medical Definition of hydration
1 : the act or process of combining or treating with water: as
a : the introduction of additional fluid into the body hydration sometimes helps to reduce the concentration of toxic substances in the tissues
b : a chemical reaction in which water takes part with the formation of only one product hydration of ethylene to ethyl alcohol especially : a reaction in which water takes part in the form of intact molecules
2 : the quality or state of being hydrated especially : the condition of having adequate fluid in the body tissues
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